Systems and methods for persistent atomic storage operations

摘要

A storage layer presents logical address space of a non-volatile storage device. The storage layer maintains logical interfaces to the non-volatile storage device, which may include arbitrary, any-to-any mappings between logical identifiers and storage resources. Data may be stored on the non-volatile storage device in a contextual format, which includes persistent metadata that defines the logical interface of the data. The storage layer may modify the logical interface of data that is stored in the contextual format. The modified logical interface may be inconsistent with the existing contextual format of the data on the non-volatile storage media. The storage layer may provide access to the data in the inconsistent contextual format through the modified logical interface. The contextual format of the data may be updated to be consistent with the modified logical interface in a write out-of-place storage operation.

主权项

1. An apparatus, comprising:
a storage controller configured to perform an atomic transaction on a storage medium, wherein performing the atomic transaction comprises storing a plurality of data blocks for the atomic transaction on the storage medium, each data block corresponding to a respective logical identifier of a logical address space, wherein storing a data block for the atomic transaction comprises designating the stored data block for invalidation by associating the stored data block with a logical identifier of a designated set of logical identifiers that differs from the logical identifier corresponding to the data block; and a reconstruction module configured to invalidate stored data blocks that are associated with logical identifiers of the designated set of logical identifiers.